Sandvik, E., Diener, E., &Seidlitz, L. (1993). Subjective well‐being: The convergence and stability of self‐report and non‐self‐report measures. Journal of personality, 61(3), 317-342.
The validity of self-report measures of subjective well-being (SWB) was examined and compared with non-self-report measures using a sample of 136 college students studied over the course of a semester. A principal axis factor analysis of self- and non-self-report SWB measures revealed a single unitary construct underlying the measures. Conventional single-item and multi-item self-report measures correlated highly with alternative measures, with theoretical correlates of SWB, ...
